公开(公告)号：US10145067B2

公开(公告)日：2018-12-04

申请号：US15271441

申请日：2016-09-21

Applicant: ECOLAB USA, INC.

Inventor： Yulin Zhao ,  Jun Li ,  Qing Long Rao ,  Stephen Ashton ,  Weiguo Cheng ,  Aleksandar Todorovic ,  Alan Smith

IPC: D21H17/37 ,  D21H21/20 ,  D21H21/18 ,  D21H17/67 ,  D21H21/10 ,  D21C3/02 ,  D21C5/00 ,  D21C5/02 ,  D21H17/69 ,  D21H17/00 ,  D21H17/66

Abstract: Methods of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength, and enhancing filler retention in a papermaking process are disclosed. The methods improve the efficiency of drainage aids, wet web strength aids, and/or wet strength aids by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a those additives.

公开(公告)号：US20170328004A1

公开(公告)日：2017-11-16

申请号：US15531211

申请日：2015-10-27

Applicant: Ecolab USA Inc.

Inventor： Qinglong Rao ,  Yulin Zhao ,  Weiguo Cheng ,  Stephen B. Ashton ,  Aleksandar Todorovic ,  Alan Smith

IPC: D21H17/37 ,  D21H17/67 ,  D21H17/44 ,  D21H21/06 ,  D21H17/45

Abstract: A process for flocculating filler particles in water is provided. The process comprises adding a flocculant to a mixture comprising filler particles and water, wherein the flocculant has a reduced specific viscosity (“RSV”) of from about 5 dL/g to about 16 dL/g, a viscosity average molecular weight of from about 1,200,000 to about 7,500,000, and a cationic charge of from about 5 mol % to about 50 mol %. Flocs formed by flocculation of the filler particles and the flocculant have a median particle size of from about 10 um to about 150 um. The filler is not precipitated calcium carbonate alone. The flocs provided by the process are useful in increasing ash content of a paper product.

公开(公告)号：US10697121B2

公开(公告)日：2020-06-30

申请号：US15531211

申请日：2015-10-27

Applicant: Ecolab USA Inc.

Inventor： Qinglong Rao ,  Yulin Zhao ,  Weiguo Cheng ,  Stephen B. Ashton ,  Aleksandar Todorovic ,  Alan Smith

IPC: D21H17/37 ,  D21H17/67 ,  D21H17/44 ,  D21H21/06 ,  D21H17/45 ,  D21H21/10

Abstract: A process for flocculating filler particles in water is provided. The process comprises adding a flocculant to a mixture comprising filler particles and water, wherein the flocculant has a reduced specific viscosity (“RSV”) of from about 5 dL/g to about 16 dL/g, a viscosity average molecular weight of from about 1,200,000 to about 7,500,000, and a cationic charge of from about 5 mol % to about 50 mol %. Flocs formed by flocculation of the filler particles and the flocculant have a median particle size of from about 10 μm to about 150 μm. The filler is not precipitated calcium carbonate alone. The flocs provided by the process are useful in increasing ash content of a paper product.